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authorRoberto E. Vargas Caballero <k0ga@shike2.com>2015-04-13 19:03:53 +0200
committerRoberto E. Vargas Caballero <k0ga@shike2.com>2015-04-15 10:52:44 +0200
commit215bdb2da3eca77ba01b70503c527baaad67c359 (patch)
treed3d8ea65fb4496e9a26ebc55a898bc34ca37e5a8
parent56abffb4b67f235d20de30f29ba027ab34c171e3 (diff)
downloadst-215bdb2da3eca77ba01b70503c527baaad67c359.tar.gz
Add tty line support
Not always is desirable to create a pseudo terminal, and some times we want to open a terminal emulator over a tty line. With this new patch is possible to do someting like: $ st -l /dev/ttyS0 115200 Without this option was needed to launch another terminal emulator over st (for example minicom, picocom, cu, ...).
-rw-r--r--config.def.h1
-rw-r--r--st.137
-rw-r--r--st.c66
3 files changed, 91 insertions, 13 deletions
diff --git a/config.def.h b/config.def.h
index 5e7caaf..bb5596e 100644
--- a/config.def.h
+++ b/config.def.h
@@ -9,6 +9,7 @@ static char font[] = "Liberation Mono:pixelsize=12:antialias=false:autohint=fals
static int borderpx = 2;
static char shell[] = "/bin/sh";
static char *utmp = NULL;
+static char stty_args[] = "stty raw -echo -iexten echonl";
/* identification sequence returned in DA and DECID */
static char vtiden[] = "\033[?6c";
diff --git a/st.1 b/st.1
index a9fec15..9548c1a 100644
--- a/st.1
+++ b/st.1
@@ -15,11 +15,36 @@ st \- simple terminal
.IR file ]
.RB [ \-t
.IR title ]
+.RB [ \-l
+.IR line ]
.RB [ \-w
.IR windowid ]
.RB [ \-v ]
.RB [ \-e
.IR command ...]
+.RI [ commands ...]
+.PP
+.B st
+.RB [ \-a ]
+.RB [ \-c
+.IR class ]
+.RB [ \-f
+.IR font ]
+.RB [ \-g
+.IR geometry ]
+.RB [ \-i ]
+.RB [ \-o
+.IR file ]
+.RB [ \-t
+.IR title ]
+.RB [ \-l
+.IR line ]
+.RB [ \-w
+.IR windowid ]
+.RB [ \-v ]
+.RB [ \-l
+.IR line ]
+.RI [ stty_args ...]
.SH DESCRIPTION
.B st
is a simple terminal emulator.
@@ -58,6 +83,11 @@ defines the window title (default 'st').
embeds st within the window identified by
.I windowid
.TP
+.BI \-l " line"
+use a tty line instead of a pseudo terminal.
+When this flag is used
+remaining arguments are used as flags for stty.
+.TP
.B \-v
prints version information to stderr, then exits.
.TP
@@ -67,6 +97,9 @@ st executes
instead of the shell. If this is used it
.B must be the last option
on the command line, as in xterm / rxvt.
+This option is only intended for compability,
+and all the remaining arguments are used as a command
+even without it.
.SH SHORTCUTS
.TP
.B Ctrl-Print Screen
@@ -110,7 +143,9 @@ See the LICENSE file for the authors.
.SH LICENSE
See the LICENSE file for the terms of redistribution.
.SH SEE ALSO
-.BR tabbed (1)
+.BR tabbed (1),
+.BR utmp (1),
+.BR stty (1)
.SH BUGS
See the TODO file in the distribution.
diff --git a/st.c b/st.c
index bb8c365..d22c605 100644
--- a/st.c
+++ b/st.c
@@ -352,6 +352,7 @@ static void draw(void);
static void redraw(void);
static void drawregion(int, int, int, int);
static void execsh(void);
+static void stty(void);
static void sigchld(int);
static void run(void);
@@ -508,6 +509,7 @@ static char *opt_title = NULL;
static char *opt_embed = NULL;
static char *opt_class = NULL;
static char *opt_font = NULL;
+static char *opt_line = NULL;
static int oldbutton = 3; /* button event on startup: 3 = release */
static char *usedfont = NULL;
@@ -1253,11 +1255,55 @@ sigchld(int a) {
exit(EXIT_SUCCESS);
}
+
+void
+stty(void)
+{
+ char cmd[_POSIX_ARG_MAX], **p, *q, *s;
+ size_t n, siz;
+
+ if((n = strlen(stty_args)) > sizeof(cmd)-1)
+ die("incorrect stty parameters\n");
+ memcpy(cmd, stty_args, n);
+ q = cmd + n;
+ siz = sizeof(cmd) - n;
+ for(p = opt_cmd; p && (s = *p); ++p) {
+ if((n = strlen(s)) > siz-1)
+ die("stty parameter length too long\n");
+ *q++ = ' ';
+ q = memcpy(q, s, n);
+ q += n;
+ siz-= n + 1;
+ }
+ *q = '\0';
+ system(cmd);
+}
+
void
ttynew(void) {
int m, s;
struct winsize w = {term.row, term.col, 0, 0};
+ if(opt_io) {
+ term.mode |= MODE_PRINT;
+ iofd = (!strcmp(opt_io, "-")) ?
+ STDOUT_FILENO :
+ open(opt_io, O_WRONLY | O_CREAT, 0666);
+ if(iofd < 0) {
+ fprintf(stderr, "Error opening %s:%s\n",
+ opt_io, strerror(errno));
+ }
+ }
+
+ if (opt_line) {
+ if((cmdfd = open(opt_line, O_RDWR)) < 0)
+ die("open line failed: %s\n", strerror(errno));
+ close(STDIN_FILENO);
+ dup(cmdfd);
+ stty();
+ return;
+ }
+
/* seems to work fine on linux, openbsd and freebsd */
if(openpty(&m, &s, NULL, NULL, &w) < 0)
die("openpty failed: %s\n", strerror(errno));
@@ -1267,6 +1313,7 @@ ttynew(void) {
die("fork failed\n");
break;
case 0:
+ close(iofd);
setsid(); /* create a new process group */
dup2(s, STDIN_FILENO);
dup2(s, STDOUT_FILENO);
@@ -1281,16 +1328,6 @@ ttynew(void) {
close(s);
cmdfd = m;
signal(SIGCHLD, sigchld);
- if(opt_io) {
- term.mode |= MODE_PRINT;
- iofd = (!strcmp(opt_io, "-")) ?
- STDOUT_FILENO :
- open(opt_io, O_WRONLY | O_CREAT, 0666);
- if(iofd < 0) {
- fprintf(stderr, "Error opening %s:%s\n",
- opt_io, strerror(errno));
- }
- }
break;
}
}
@@ -4009,9 +4046,11 @@ run(void) {
void
usage(void) {
- die("%s " VERSION " (c) 2010-2015 st engineers\n" \
+ die("%s " VERSION " (c) 2010-2015 st engineers\n"
"usage: st [-a] [-v] [-c class] [-f font] [-g geometry] [-o file]\n"
- " [-i] [-t title] [-w windowid] [-e command ...] [command ...]\n",
+ " [-i] [-t title] [-w windowid] [-e command ...] [command ...]\n"
+ " st [-a] [-v] [-c class] [-f font] [-g geometry] [-o file]\n"
+ " [-i] [-t title] [-w windowid] [-l line] [stty_args ...]\n",
argv0);
}
@@ -4047,6 +4086,9 @@ main(int argc, char *argv[]) {
case 'o':
opt_io = EARGF(usage());
break;
+ case 'l':
+ opt_line = EARGF(usage());
+ break;
case 't':
opt_title = EARGF(usage());
break;